diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c6a5129d..dc4ebfac 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -131,17 +131,6 @@ jobs:
           EXTRA_ARGS : "-Dtycho-version=5.0.0-SNAPSHOT -Ptycho_snapshots" 
         run: xvfb-run scripts/greetings-tycho-2.34.sh
   build_domain:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - name: Set up JDK 17
-        uses: actions/setup-java@v3
-        with:
-          distribution: 'temurin'
-          java-version: 17
-      - name: Build
-        run: xvfb-run scripts/domainmodel-2.34.sh
-  build_domain_tycho_40_J17:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
@@ -155,8 +144,6 @@ jobs:
         with:
           maven-version: 3.9.1
       - name: Build
-        env:
-          EXTRA_ARGS : "-Dtycho-version=4.0.1" 
         run: xvfb-run scripts/domainmodel-2.34.sh
   build_domain_tycho_50_J17:
     runs-on: ubuntu-latest
diff --git a/domainmodel/2.34.0/org.eclipse.xtext.example.domainmodel.releng/pom.xml b/domainmodel/2.34.0/org.eclipse.xtext.example.domainmodel.releng/pom.xml
index bc8ae79c..97dc5c5f 100644
--- a/domainmodel/2.34.0/org.eclipse.xtext.example.domainmodel.releng/pom.xml
+++ b/domainmodel/2.34.0/org.eclipse.xtext.example.domainmodel.releng/pom.xml
@@ -24,7 +24,7 @@
 		<maven.compiler.source>11</maven.compiler.source>
 		<maven.compiler.target>11</maven.compiler.target>
 		<!-- Tycho settings -->
-		<tycho-version>3.0.5</tycho-version>
+		<tycho-version>4.0.4</tycho-version>
 		<targetplatform.groupId>${project.groupId}</targetplatform.groupId>
 		<targetplatform.artifactId>${project.groupId}.tp</targetplatform.artifactId>
 		<targetplatform.version>${project.version}</targetplatform.version>